The Method of Removing Cone Slope of Ribbed Abutment in Road Operation State

Abstract

The invention discloses a ribbed bridge abutment conical slope cutting method in a road operation state. The ribbed bridge abutment conical slope cutting method combines multiple technical measures and includes technologies such as subgrade (foundation) grouting reinforcement, soil nailing support, connection of reinforced concrete plates between ribs of a ribbed platform, roadbed stability monitoring and traffic organization of collaborative construction, so that the soil nailing support, the ribbed platform and a panel form an integral supporting structure to bear soil pressure behind the platform after conical slope cutting, the safety of the ribbed platform conical slope cutting in the construction process and in the permanent use is ensured, so that the ribbed bridge abutment conicalslope cutting method has practical feasibility and avoids the problems such as high construction or use risks, high cost, long construction period, large resource consumption and great influence on operation caused by the demolition and reconstruction of bridges.

Description

technical field [0001] The invention belongs to the technical field of road engineering, and in particular relates to a method for cutting a ribbed abutment cone slope in a road operation state. Background technique [0002] The bridge abutment is a building located at both ends of the bridge, supporting the superstructure of the bridge and connecting with the embankment. Rib abutment (referred to as rib abutment) is a type of abutment. In addition to transmitting the load of the bridge superstructure to the foundation, it also has the functions of resisting the filling pressure behind the abutment, stabilizing the subgrade at the bridge head, and making the bridge head line and the bridge The role of reliable and stable connection of the line, so the ribbed abutment generally adopts reinforced concrete structure. [0003] The ribbed abutment generally adopts the form of a conical slope in front of the abutment, and its filling is carried out together with the subgrade behi...

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Problems solved by technology

[0007] Prestressed anchor (cable) is also a technology for slope support. Since similar soil nails use horizontal drilling, the construction work is less difficult than anti-slide piles, but the force of prestressed anchor (cable) depends on the anchorage section. The frictional resistance between the grouting body and the surrounding soil is not suitable for artificial filling of roadbeds. The longer the anchorage section required, the more difficult the anchor rod (cable) construction is, which is reflected in the fact that the working space may not be enough. Or the collapse of the hole during the drilling process is serious and it is difficult to form a hole, etc.; therefore, the prestressed anchor rod (cable) is also poorly adaptable to the slope support after the cone slope is removed, and the engineering field generally does not use it.

[0008] The use of space under the bridge is one of the needs of people’s economic activities. Since activities such as widening the road under the bridge need to release part of the space under the bridge occupied by the cone slope, it is necessary to remove the cone slope, but the simple and direct cone slope removal will change. The stable state of the roadbed at the abutment will cause the roadbed to slide and cause engineering accidents, so necessary engineering measures are required to guarantee it

[0009] At present, there is no suitable method to ensure the safety of the construction period and service period for the removal of the rib platform cone slope, especially when the roadbed is high. When encountering it, the engineering community often adopts the treatment method of demolishing the bridge and rebuilding it. This method is relatively conventional, theoretical and standardized. Mature, low-risk, can solve the demand, but the demolition and reconstruction of bridges will bring about problems such as increased cost, increased construction period, increased resource consumption, and interrupted road operations. The cost is extremely high, and sometimes (such as when traffic cannot be interrupted) is not feasible

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